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S616 Trimming Knife.

.No. 236,976. Patented Jan. 25, 1881.

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UNIT D STATES PATENT OFFICE.

WILLIAM R. BARTON, OF BRIDGEWATER, MASSACHUSETTS, ASSIGNOR OF ONE-HALFTO GEORGE G. HAMMOND, OF CENTRAL FALLS, R. I.

SOLE-TRIMMING KNIFE.

SPECIFICATION forming part of Letters Patent No. 236,976, dated January25, 1881.

Application filed December 9, 1880. (ModeL) To all whom it may concern:

Be it known that I, WILLIAM R. BARTON, a citizen of the United States,residing at Bridgewater, in the county of Plymouth and State ofMassachusetts, have invented new and useful Improvements inSole-Trimming Knives, of which the following is a specification.

This invention relates to a guard-knife for trimming the soles and otherparts of boots and shoes, its object being to provide against cuttingthe upper in the process of trimming.

The invention consists in an arched arm spanning the knife, and havingat one end a clamp embracing the knife and at its other end a guardextending across the end of the knife, the arched arm being providedwith an adjustable gage-plate, all of which Will be more fully describedhereinafter, and specifically pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective view of aguard-knife constructed according to my invention. Fig. 2 is aperspective view of the guard detached. Fig. 3 is a section in the planeindicated by line as as, Fig. 1.

The letter A indicates a blade projecting from a handle in the usualmanner, and B is an adjustable clamp embracing the blade near thehandle. From the upper side of this clamp springs a curved arch-shapedarm, 0, extending toward the end of the blade, and carrying at its outerend a guard-plate, D, extending across and lying against the end edge ofthe knife, so as to lie between the said edge and the upper of a boot orshoe when the knife is being used to trim the edge thereof. A shortdistance from its lower edge this guard-plate is provided with alongitudinal groove, 0, into which the end edge of the knife sets, andthe shavings are thus prevented from being caught between the end edgeof the knife and the guard-plate. plate extends somewhat beyond thecuttingedge of the knife, for the purpose of preventing the sharp frontcorner of the blade or the end of its cutting-edge from coming incontact with the upper accidentally.

The letter F designates an adjustable gageplate, the inner edge of whichlies in front The front edge of the guard.

of and parallel with the cutting-edge of the knife, and from the uppersurface of thisgageplate rises a slotted arm, g, a broad longitudinalrib, h, on the back of which fits inatransverse guide-groove in the arm0. Ascrew, 2', passing through the slot in the arm 9 and into ascrew-hole in the arm 0, serves to hold the gage-plate at any adjustmentof the same, the slot in said arm g permitting the gageplate to beadjusted above the knife-edge for regulating the out.

For a portion of its length next to the handle the blade A has its bladepreferably cut away, forming a shank, A, narrower than the other part ofthe blade, and it is this shank or narrower portion that the clamp Bembraces, and is thus rendered adjustable transversely as well aslongitudinally, the space between its jaws being wider than said shank.By reason of this transverse adjustability of the clamp, it will be seenthat the gage-plate may be kept at a proper distance in front of theknife-edge, as such edge is gradually worn away.

Though I have shown in the drawings a knife having an oblique end edgeand a guardplate to correspond, I do not confine myself to such shapesof these parts, as it is obvious that a guard-plate can be fitted to thecurved or right-angled end edge of a knife, if found desirable.

What I claim is 1. In a sole-trimmer for boots and shoes, thecombination, with the knife A, of the arched arm 0, having at one endthe clamp B, embracing the knife, and at the other end the guard D,extending across the end of the knife, and the gage-plate F, arranged infront of and parallel to the cutting-edge of the knife, and having avertically-projecting arm, g, ad- 0 justably connected with the archedbar, all substantially as described.

2. The combination, with the knife, of the arched arm 0, constructedwith the clamp 13, guard D, and the central transverse guide- 5 groove,and the gage-plate F, constructed with the vertically-projectin gslotted arm g, having a rib, h, adjustably secured in the transversegroove of the arched arm by a screw, i, all

substantially as shown and described. 10c

3. The combination, with the knife A, of the my hand in the presence oftwo subscribing arched arm C, carrying, an adjustable gagewitnesses.plate, F, and provided at its outer end with the guard I), having alongitudinal groove, e,

5 in which the end of the knife bears, substan- Witnesses:

tially as and for the purpose described. RICHMOND A. BARTON,

In testimony whereof I have hereunto set WILLIAM E. BARTON.

WILLIAM RANDAL BARTON.

